@misc{indiciae77e0b9c7c954,
  title = {[Matrices: the Biaggi ring].},
  author = {E Pivetta and S Pedretti and G Pivetta},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2635039/},
  note = {Source identifier: 2635039}
}